UPSTREAM: media: Add Y212 v4l2 format info

Y212 is a YUV format with 12-bits per component like YUYV,
expanded to 16bits.
Data in the 12 high bits, zeros in the 4 low bits,
arranged in little endian order.

Add the missing v4l2 foramt info of Y212

Bug: 293213303
Change-Id: Ibdf9bb3a3f1eb895da9eca52d115e08b656b5153
(cherry picked from commit a178dd3b)
Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Jindong Yue <jindong.yue@nxp.com>